Anyone know about this steel?

[Sharpnessis]

Is the "cryoedge" of any importance? I figured it is 440a with a dip in liquid nitrogen? Just wondering if anyone has any experience with it.

 

[Sharpnessis]

Here's the whole thing.

 

[Austinaftermath]

I remember cold steel used to do that to 440 or 420; they called it Sub zero quench though. I forgot what they said it did though.

 

[roughedges]

I forgot what they said it did though.

It isn't specifically a Cold Steel thing. Here's my layman's imperfect, and hopefully entirely accurate , explanation. Heat treating a blade changes carbon bases steels from ferrite into austenite. Quenching below zero, with dry ice is most common I think, converts more austenite to martensite than other methods. This allows for a knife that is harder and more wear resistant. In knives, I think it is more commonly used with stainless steels than anything else.

 

[Sharpnessis]

It isn't specifically a Cold Steel thing. Here's my layman's imperfect, and hopefully entirely accurate , explanation. Heat treating a blade changes carbon bases steels from ferrite into austenite. Quenching below zero, with dry ice is most common I think, converts more austenite to martensite than other methods. This allows for a knife that is harder and more wear resistant. In knives, I think it is more commonly used with stainless steels than anything else.

With that many big words it's gotta be accurate .
I'm looking to sell it to a friend and want to make sure it's not junk.